Tension device for loom-shuttles



(No Model.)

, S. M. HAMBLIN. TENSION DEVICE FOR LOOM SHUTTLBS.

No. 550,611. Patented Dec. 3.11 95.

UNITED STATES PATENT OFFICE.

STEPHEN M. I-IAMBLIN, OF NEW BEDFORD, ASSIGNOR OF ONE-HALF TO EDVIN S.DAMON, OF PLYMOUTH, MASSACHUSETTS.

TENSION DEVICE FOR LOOM-SHUTTLES.

SPECIFICATION forming part of Letters Patent No. 550,611, dated December3, 1895.

Application filed arch 11,139

To aZZ whom. it may concern:

Be it known that I, STEPHEN M. HAMBLIN, a citizen of the United States,residing at New Bedford, in the county of Bristol and State ofMassachusetts, have invented certain new and useful Improvements inTension Devices for Loom-Shuttles, of which the following is aspecification.

The accompanying drawings illustrate my invention, in which- Figure 1 isa top view of a portion of a loomshuttle, showing my improved tensiondevice properly adjusted therein. Fig. 2 is a side view of the tensiondevice as it appears when removed from the shuttle. Fig. 3 is a top viewof the same. Fig. 4 is view in perspective of the device with theregulating and retaining screw removed and showing a slight modificationin its construction. Fig. 5 is a View in cross-section through thedotted line 00 at of Fig. 1. Fig. 6 is a view of the screw by means ofwhich the tension device is retained in the shuttle and the tensionregulated.

Similar letters refer to similar parts in the several views.

The letter a indicates a portion of a shuttle-body having the recess amade in one side of the throat thereof, in which recess is se= cured thetension device 19, consisting of a piece of spring sheet metal bent intoa semicircle, with the ends elongated parallel to each other, having oneend provided with the square hole 0, and the other end with the roundhole 01-, and a screw 6, adapted to pass through the hole d, having asquare shoulder under its head adapted to fit in the square hole 0.

In Figs. 2 and 5 the spring I? is shown as having its lower end bentupon itself and extending to a point in line with the portion of thecircle 17, where it is slightly bent downward, as at 61 When the tensiondevice is constructed. as shown in Fig. 2, the thread runs between theparts d and 61 but when it is constructed as shown in Fig. 4 the threadruns between the part d and the bottom of the throat of the shuttle, andwhen greater tension on the thread is desired the end 11 of the spring7) Serial No 541,274. (No model.)

is pressed downward until the square hole 13 therein is free from thesquare shoulder e and the screw is advanced to a sufficent clegree. Tolessen the degree of tension, the screw is retracted.

The ends of the spring I) are preferably made square, so that when thedevice is ad j usted, as shown, the said ends will bear against the sideof the recess and prevent the device from turning from side to side andgetting out of its proper position.

It will be observed that when the square shoulder of the screw is in thesquare hole in the springb the screwis prevented from turning andWorking out, and thus a uniform tension is maintained on the thread.

It will also be observed that the operation of threading the shuttle isthe same either with or without the tension device and that the threadwill draw under the tension device of its own motion.

Having thus described my invention, what I claim, and desire to secureby Letters Patcut, is-

1. In combination with a loom shuttle, a tension device, consisting of asemicircular spring, having one end provided with a square hole, and theother with a round hole; and a screw, having a short square shoulderunder its head, and adapted to pass through said holes and secure saidspring in the shuttle, substantially as shown and described.

2. A tension device for a loom shuttle, consisting of a piece of springmetal bent into a semicircular shape, having one of its ends bentoutward and back upon itself, and extending tangentially to a point inline with the swee of the circle, and having its single end providedwith a square hole, and its doubled end witha round hole; and ascrew,having a short square shoulder under its head, and adapted to passthrough said holes, and

secure said spring in the shuttle, substantially Witnesses:

HENRY W. MASON, FRANK M. SPARROW.

